Reproduction Parts for Mercury Outboard Engines

The Quincy down / drive shaft housing for early Mercury 6 cylinders.

The patterns and core box were obtained from Harry Brinkman with the understanding that they would be readily available for other pseudo Mark75H and other restorations and build ups. I'm learning a great deal as I work through the race equipment as I'm mostly a stock collector '39-'62 and am just beginning to venture into the racing realm. Any advice, addition history and applications of this unit would be greatly welcomed. Here are some pictures of the first part. The cost per casting unmachined is $495. I have ten in stock for now. This housing mates with the Mercury Speedmaster I (I believe) and Speedmaster II. There may be others?? Again these are from the original Quincy patterns. Thanks